Hello, The following program causes a memory leak : // autogenerated by syzkaller (http://github.com/google/syzkaller) #include <syscall.h> #include <sys/types.h> #include <sys/socket.h> #include <string.h> #include <stdint.h> #include <linux/in.h> #include <linux/socket.h> int main() { long r1 = syscall(SYS_socket, PF_INET6, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, IPPROTO_SCTP); const char *opt = "\x15\x53\x5e\x2d\x97\xab\xe1"; long r3 = syscall(SYS_setsockopt, r1, 0x29ul, 0x6ul, opt, 0x7ul); return 0; } unreferenced object 0xffff880039a55260 (size 64): comm "executor", pid 11746, jiffies 4298984475 (age 16.078s) hex dump (first 32 bytes): 2f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 /............... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [< inline >] kmalloc include/linux/slab.h:463 [<ffffffff848a2f5f>] sock_kmalloc+0x7f/0xc0 net/core/sock.c:1774 [<ffffffff84e5bea0>] do_ipv6_setsockopt.isra.7+0x15d0/0x2830 net/ipv6/ipv6_sockglue.c:483 [<ffffffff84e5d19b>] ipv6_setsockopt+0x9b/0x140 net/ipv6/ipv6_sockglue.c:885 [<ffffffff8544616c>] sctp_setsockopt+0x15c/0x36c0 net/sctp/socket.c:3702 [<ffffffff848a2035>] sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2645 [< inline >] SYSC_setsockopt net/socket.c:1757 [<ffffffff8489f1d8>] SyS_setsockopt+0x158/0x240 net/socket.c:1736 I confirmed that running this program in a loop steadily increases number of objects in kmalloc-64 slab. The leak does not happen with IPPROTO_TCP, so probably it is sctp-related. On commit 31ade3b83e1821da5fbb2f11b5b3d4ab2ec39db8 (Nov 29). -- To unsubscribe from this list: send the line "unsubscribe linux-sctp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
